When the glass brick is separated from the large-area wall to form an independent building, it is the most expressive. The characteristic is that it is flexible and free to match. Designers can mix and match glass bricks at any angle of color, plane, three-dimensional, etc. The wall is more like a graffiti or an impromptu freehand, as long as you think of it, it can be put into practice. Even, you can hand-draw a picture, and the whole picture can jump on the wall.